ABAP Select data from SAP table PIQISH_INTREGT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PIQISH_INTREGT table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to PIQISH_INTREGT. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the PIQISH_INTREGT table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_PIQISH_INTREGT TYPE STANDARD TABLE OF PIQISH_INTREGT,
      WA_PIQISH_INTREGT TYPE PIQISH_INTREGT,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <PIQISH_INTREGT> TYPE PIQISH_INTREGT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PIQISH_INTREGT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PIQISH_INTREGT
  INTO TABLE IT_PIQISH_INTREGT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PIQISH_INTREGT
*  INTO TABLE @DATA(IT_PIQISH_INTREGT2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_PIQISH_INTREGT INDEX 1 INTO DATA(WA_PIQISH_INTREGT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PIQISH_INTREGT ASSIGNING <PIQISH_INTREGT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PIQISH_INTREGT>-INST_PARTNER_TXT = 1.
<PIQISH_INTREGT>-CONTACT_PARTNER_TXT = 1.
<PIQISH_INTREGT>-ACAD_YEAR_TXT = 1.
<PIQISH_INTREGT>-ACAD_SESSION_TXT = 1.
<PIQISH_INTREGT>-STATUS_TXT = 1.

ENDLOOP.

LOOP AT IT_PIQISH_INTREGT INTO WA_PIQISH_INTREGT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PIQISH_INTREGT-CATEGORY1_TXT, sy-vline,
  WA_PIQISH_INTREGT-CATEGORY2_TXT, sy-vline,
  WA_PIQISH_INTREGT-CATEGORY3_TXT, sy-vline,
  WA_PIQISH_INTREGT-CATEGORY4_TXT, sy-vline,
  WA_PIQISH_INTREGT-CATEGORY5_TXT, sy-vline,
  WA_PIQISH_INTREGT-SC_SHORT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PIQISH_INTREGT you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_PIQISH_INTREGT TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_PIQISH_INTREGT INTO WA_PIQISH_INTREGT.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_PIQISH_INTREGT_STR, 
INST_PARTNER_TXT TYPE STRING,
CONTACT_PARTNER_TXT TYPE STRING,
ACAD_YEAR_TXT TYPE STRING,
ACAD_SESSION_TXT TYPE STRING,
STATUS_TXT TYPE STRING,
CATEGORY1_TXT TYPE STRING,
CATEGORY2_TXT TYPE STRING,
CATEGORY3_TXT TYPE STRING,
CATEGORY4_TXT TYPE STRING,
CATEGORY5_TXT TYPE STRING,
SC_SHORT TYPE STRING,
SC_STEXT TYPE STRING,
ACLEVEL_TXT TYPE STRING,
REF_SHORT TYPE STRING,
REF_STEXT TYPE STRING,
UNIT_TXT TYPE STRING,
STUDENT_FIRSTNAME TYPE STRING,
STUDENT_LASTNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PIQISH_INTREGT_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_PIQISH_INTREGT_STR-INST_PARTNER_TXT sy-vline 
WA_PIQISH_INTREGT_STR-CONTACT_PARTNER_TXT sy-vline 
WA_PIQISH_INTREGT_STR-ACAD_YEAR_TXT sy-vline 
WA_PIQISH_INTREGT_STR-ACAD_SESSION_TXT sy-vline 
WA_PIQISH_INTREGT_STR-STATUS_TXT sy-vline 
WA_PIQISH_INTREGT_STR-CATEGORY1_TXT sy-vline 
WA_PIQISH_INTREGT_STR-CATEGORY2_TXT sy-vline 
WA_PIQISH_INTREGT_STR-CATEGORY3_TXT sy-vline 
WA_PIQISH_INTREGT_STR-CATEGORY4_TXT sy-vline 
WA_PIQISH_INTREGT_STR-CATEGORY5_TXT sy-vline 
WA_PIQISH_INTREGT_STR-SC_SHORT sy-vline 
WA_PIQISH_INTREGT_STR-SC_STEXT sy-vline 
WA_PIQISH_INTREGT_STR-ACLEVEL_TXT sy-vline 
WA_PIQISH_INTREGT_STR-REF_SHORT sy-vline 
WA_PIQISH_INTREGT_STR-REF_STEXT sy-vline 
WA_PIQISH_INTREGT_STR-UNIT_TXT sy-vline 
WA_PIQISH_INTREGT_STR-STUDENT_FIRSTNAME sy-vline 
WA_PIQISH_INTREGT_STR-STUDENT_LASTNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.